Landmark Inventions and Discoveries

Flashcards on transformative technological breakthroughs, scientific discoveries, and Nobel Prize milestones.

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Inventor of Movable Metal Type Printing Press

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Inventor of Movable Metal Type Printing Press

Johannes Gutenberg c. 1440 in Mainz, Germany, combining an oil-based ink and an adjustable hand-mould.

Discoverer of Electromagnetic Induction

Michael Faraday in 1831 in London, demonstrating that a changing magnetic flux induces an electric current.

Discoverer of Penicillin

Sir Alexander Fleming in September 1928 at St. Mary's Hospital, London, from the fungus Penicillium notatum.

Discoverer of X-Rays

Wilhelm Conrad Rontgen in November 1895 in Wurzburg, winning the inaugural 1901 Nobel Prize in Physics.

Discoverer of the Laws of Planetary Motion

Johannes Kepler (published 1609 and 1619), showing elliptical orbits with the Sun at one focus.

Discoverer of the Law of Universal Gravitation

Sir Isaac Newton, published in Philosophiae Naturalis Principia Mathematica in 1687.

Formulation of the Periodic Table by Atomic Weight

Dmitri Mendeleev in 1869, accurately predicting the properties of undiscovered elements.

Discovery of the Dual Helix Structure of DNA

James Watson and Francis Crick (1953), using X-ray crystallography data from Rosalind Franklin.

Inventor of the Telephone (First US Patent)

Alexander Graham Bell, awarded US Patent 174,465 on March 7, 1876.

Inventor of Practical Incandescent Light Bulb

Thomas Alva Edison (1879 patent), developing a high-resistance carbon filament and durable vacuum bulb.

Pioneer of Commercial Wireless Telegraphy (Radio)

Guglielmo Marconi, receiving British Patent 12,039 in 1896 and transmitting across the Atlantic in 1901.

Inventor of the World Wide Web

Tim Berners-Lee in 1989 at CERN, developing HTML, HTTP, and the first web browser/server.

Only Person to Win Nobel Prizes in Two Scientific Fields

Marie Curie: Physics (1903, shared with Pierre Curie and Becquerel) and Chemistry (1911, for radium/polonium).

Discoverer of Smallpox Vaccination

Edward Jenner in 1796, using cowpox fluid from Sarah Nelmes to inoculate James Phipps.

Developer of the First Successful Inactivated Polio Vaccine

Dr. Jonas Salk at the University of Pittsburgh, declared safe and effective in 1955.

Discoverer of General Relativity

Albert Einstein, published in 1915, describing gravity as curvature of spacetime induced by mass-energy.

Inventor of the Steam Engine with Separate Condenser

James Watt, patented in 1769, drastically improving thermodynamic efficiency and fueling the Industrial Revolution.

Inventor of the Four-Stroke Internal Combustion Engine

Nikolaus August Otto in 1876 in Germany (the Otto cycle).

Pioneers of Controlled Powered Airplane Flight

Orville and Wilbur Wright on December 17, 1903, at Kitty Hawk, North Carolina.

Establishment of the Nobel Prizes

Created by the 1895 will of Swedish industrialist Alfred Nobel, inventor of dynamite; first awarded in 1901.

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